VDB-10837 · OSVDB 98587 · GCVE-100-10837

FFmpeg 2.0 Negative Coded Block Pattern libavcodec/cavsdec.c decode_mb_i array index

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FFmpeg 2.0. This affects the function decode_mb_i of the file libavcodec/cavsdec.c of the component Negative Coded Block Pattern Handler. This manipulation causes array index. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as critical was found in FFmpeg 2.0 (Multimedia Processing Software). Affected by this vulnerability is the function decode_mb_i of the file libavcodec/cavsdec.c of the component Negative Coded Block Pattern Handler. The manipulation with an unknown input leads to a array index vulnerability. The CWE definition for the vulnerability is CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. As an impact it is known to affect confidentiality, and availability.

The issue has been introduced in 07/11/2013. The weakness was disclosed 10/13/2013 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as cavs: Check for negative cbp as confirmed advisory (Website). The advisory is shared at git.libav.org. The public release has been coordinated in cooperation with the project team. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 94 days. During that time the estimated underground price was around $0-$5k.

Applying the patch cavs: Check for negative cbp is able to eliminate this problem. The bugfix is ready for download at git.libav.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (98587†). Additional details are provided at git.libav.org. The entry VDB-10838 is pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • FFmpeg 2.0
  • Libav 9.9

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.1
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Array index
CWE: CWE-129 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: cavs: Check for negative cbp

Timelineinfo

07/11/2013 🔍
10/13/2013 +94 days 🔍
10/13/2013 +0 days 🔍
10/17/2013 +4 days 🔍
04/16/2019 +2007 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: cavs: Check for negative cbp
Researcher: Mateusz Jurczyk, Gynvael Coldwind
Organization: Google Security Team
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-10837
OSVDB: 98587

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/17/2013 10:40
Updated: 04/16/2019 09:34
Changes: 10/17/2013 10:40 (54), 04/16/2019 09:34 (2)
Complete: 🔍
Committer:
Cache ID: 216:6CD:103

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